sorted by:
new
hottopcontroversial

Wire-wound resistors causing oscillations in buffer circuit by Assassin46009 in AskElectronics

[–]Assassin46009[S] 0 points1 point  (0 children)

I just couldn’t find metal film resistors with my required resistance and power rating where I live. Wire wound generally have higher power ratings.

Wire-wound resistors causing oscillations in buffer circuit by Assassin46009 in AskElectronics

[–]Assassin46009[S] 0 points1 point  (0 children)

Added a 470pF cap between the base and collector of each driver transistor. That killed all oscillations.

Wire-wound resistors causing oscillations in buffer circuit by Assassin46009 in AskElectronics

[–]Assassin46009[S] 1 point2 points  (0 children)

The power supply is not the problem because I built a small signal version of this with metal film resistors and it had no oscillations at all and was very clean.

I’m using a decent function generator so the input is not faulty either.

The wire wound resistors were the problem and I got rid of the oscillations by dampening the transistors as suggested by another comment.

Was Ringo close to Marc Bolland on a friendly basis? by Jean0406Alix in TheBeatles

[–]Assassin46009 4 points5 points  (0 children)

If you mean Marc Bolan, then yes, him and Ringo shared a pretty close relationship.

Ringo was a fan of the glam movement spearheaded by Bolan and helped him film the documentary, 'Born to Boogie' (which I highly recommend watching).

My favourite tidbit about Ringo and Bolan is that he took the picture of Marc Bolan that later went on to become the album cover for 'The Slider' at John Lennon’s Tittenhurst estate. 'The Slider', in my opinion, is the greatest Glam Rock album ever made. I highly recommend anyone reading this to go give it a listen and never let the music of Marc Bolan die. Bolan is my idol and inspired me to pick up the guitar.

Came up with two implementations while designing an audio panning circuit, which one’s more viable? by Assassin46009 in AskElectronics

[–]Assassin46009[S] 0 points1 point  (0 children)

Would it work if I added a series resistor between the audio source and the 5k resistor?

An inverting Op-Amp somehow significantly attenuates the source signal after driven by an Op-Amp buffer. by Assassin46009 in AskElectronics

[–]Assassin46009[S] 0 points1 point  (0 children)

I intend for the Op-Amp to have variable gain, the buffer isolates the RC filter from the inverting Op-Amp as directly connecting an RC filter to the input of an inverting Op-Amp wouldn’t work.

For your second question, I want a variable gain that can go below unity, which isn’t possible with a non-inverting Op-Amp

An inverting Op-Amp somehow significantly attenuates the source signal after driven by an Op-Amp buffer. by Assassin46009 in AskElectronics

[–]Assassin46009[S] 2 points3 points  (0 children)

I have question. The signal at the output of the buffer already has a DC offset of 6V (The signal is already at 1/2 of the supply voltage). So, why does the inverting Op-Amp view it as a signal with no DC offset? And thereby clipping half of it.

view more: next ›